Centrifugal pump



1940- L. s. SHELDRICK 9 CENTRIFUGAL PUMP Filed July 9, 1936 INVENTOR.

l'fatented Feb. 27, 1940 I CENTRIFUGAL PUIHP Laurence Spence Sheldrick, Dearborn, Mich., as-

signor to Ford Motor Company, Deal-born,

Mich, a corporation of Delaware Application is, 9, 1936, Serial No. 89,784

ioiaim. (o1. cos-36.2) The object of my invention is to provide a with avertically extending passageway 23 in the centrifugal pump especially adapted for internal-combustion engine. My improved pump is believed to be more eflicient in operation and simpler to construct than the conventional type.

Still a further object of my invention is to provide a water pump which is lubricated by oil from the engine oiling system and which pump has provisions for keeping water which may seep through the pump seal from entering the oil reservoir. Heretofore most water pumps have been lubricated through grease fittings or a separate oil supply which requires periodic servicing. My improved construction requires no attention what- 'ever as the oil reservoir'is kept filled by the nor-' mal operation of the motor.

Still a further object of my invention is to provide a centrifugal pump having a single annulus of propeller vanes, and which pump is free from end thrust, due to the pressure developed on the tion and combinationof the various parts of my improved device, as described in this specification, claimed in my claim and illustrated in the accompanying drawing, in which:

Figure 1 is a sectional view, taken vertically through my improved pump, and

Figure 2 is a sectional view, taken on the line 2-2 of Flgurel.

Referring to the accompanying drawing, I have used the reference numeral ill to indicate the cylinder block casting of an internal-combustion that the housing I3 is provided with a cylindrical sleeve 21 over which an inlet hose 22 is secured.

This sleeve is aligned with the lowermost .part of the cylinder block water jacket and connects the forward end of the shaft 23 having a pulley housing l9, which passageway 23 terminates in an opening 24 which is aligned with the opening I l in the cylinder block. Thus water may enter through the sleeve 2| and then circulate upwardly 5 through the passageway 23 and then through the aligned openings 24 and H so as to enter the cylinder block. It will be noted that a suitable flange 25 extends outwardly from the housing l9 through which three of the screws-20 are secured, 10 while the other two screws extend through the center portion of each housing. Five cap screws are used to secure the housing l9v to the cylinder block in order that these housings may support. the front end of the motor. 1

An oil reservoir 21 is cast integrally with the upper end of the pump housing IS, the reservoir 21 projecting forwardly therefrom and having a chamber therein in which oil is received. A bushing 28 is pressed through suitable openings incthe walls of the reservoir and extends therethrough 'in substantial alignment with the opening 24.

The bushing 28 is formed of porous. bronze which is constructed so that lubricant applied tothe outside of the bushing filters through and lubricates the shaft which is supported thereby. A pump shaft 29 is rotatably mounted in the bushing 28and projects from each end of the bushing,

30 fixed thereto. The other end of the shaft 29 is provided with an impeller 3|, this impeller comprising a hub member having a radially extending flange 32 extending therefrom. It will be noted that the flange 32 is positioned inwardlythrough the opening H and that vanes 33 are cast inte- 88 grally with the flange 32 so that water will be drawn in the conventional manner through the opening 24 and discharged radially by the vanes 33. A cylindrical sleeve 34 projects inwardly from the hub member of the impeller and drives a carbon disc 35 which forms the water seal for this pump. The disc 35 is resiliently urged against the end of the housing l9 by means of a spring 36. A suitable rubber water seal sleeve 31 coacts with the shaft 29 and disc 35 to prevent water from leaking around the shaft. The water seal, per se, just described forms no part of this invention and is merely illustrated to show a suitable means of preventing water from leaking from the pump.

Referring to the drawing, it will be noted that a passageway 38, is provided between the outer wall of the housing l9 and the reservoir 21 through which the bushing 23 is pressed. The purpose of the passageway 331s to allow water which may I leak between the inner endof the bushing 28 and the housing I9 to drain out of the pump and thus prevent such water from entering into the oil reservoir 21. Water that may leak or pass the disc 35 and which travels along the shaft 29 will be thrown outwardly at the pulley end of the shaft to prevent its entering into the oil reservoir at this point. It will be noted from Figure 1 that. an internal groove 53 is formed in the periphery of the bushing receiving opening in the wall that separates the inlet and drain passageways. This groove allows the escape of fluid which may have leaked through the fluid seal,

without requiring same to flow along the pump shaft. Thus, the shaft may be lubricated along its full length without ,water tending to displace the oil.

Means will now be described whereby the oil reservoir 21 is kept filled with oil by the normal action of the motor.

It will be noted that a cam shaft gear 39 is rotatably mounted within the engine in the conventional manner and that a cam shaft gear cover plate 40 is secured to the front wall [6 of the cylinder block to form a closure for the timing gears of the motor. The casting I0 is provided with a passageway 42 which is aligned with the gear 39 and which extends toward the water pump propeller. This passageway terminates before reaching the water jacket and functions to collect oil which may be thrown from the timing gear 39. A drilled hole 43 extends through a wall l6 which forms the front face of the casting l0 and communicates with the passageway 42. A drilled opening. 44 is machined in the pump housing l9 and extends from the reservoir 21 to position adjacent to the opening 43 so that the oil reservoir 21 is at all times in direct communication with the chamber in which the timing gear 39 is located. During the normal operation of the engine, oil is thrown centrifugally by the timing gear. some of which collects in the passageway 42 and flows through the openings 43 and 44 into the oil reservoir 21. The lubricant then filters through the bushing 28 to lubricate the shaft 28.

Some changes may be made in the arrangement, construction-and combination of the various parts of my improved device without departing from the spirit of my invention, and it is my intention to cover by my claim such changes as may reasonablybe included within the scope thereof.

I claim as my invention:

A fluid pump especially adapted for circulating cooling water through an internal-combustion engine comprising, a pump housing having a water inlet passageway therein,.which passageway terminates'in an opening in said housing which is aligned with an opening in the water jacket of said engine, said pump housing also having an oil reservoir formed therein, and said housing having a drain passageway disposed between said inlet opening and said 011- reservoir, a bushing extending through said reservoir and drain passageway into said water inlet passageway, said bushing receiving oil from said reservoir, a pump shaft rotatably mounted in said bushing having ing an impeller secured to its, inner end within said inlet passageway, said impeller forming an annular radial fluid seal with said pump housing, and said housing having an internal groove formed therein which extends the length of said bushing receiving opening in the wallwhich separates said inlet passagewagzand said drain pasve conducting fluid a driving pulley secured to its outer end and hav- 

